New long COVID study uncovers high inflammation in patients

Written by Robert J. Matthews

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A new Science study shows that some of the 16 million U.S. COVID victims still have health issues.

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Long COVID is a syndrome that can last weeks, months, or years following an acute COVID-19 infection.

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 No test can confirm lengthy COVID symptoms. Some experts believe overactive immune cells induce lengthy COVID, but the exact mechanism is unknown.

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At six months, 40 of 113 mild and severe COVID-19 patients at four Swiss hospitals had long-term symptoms, and 22 had them at 12 months.

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Long-term COVID patients had increased complement activity, blood cell dysregulation (hemolysis and platelet activation), and tissue injury in their blood samples, according to researchers.

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The modest study may provide "a basis for new diagnostic solutions.

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These findings of inflammation in long COVID patients are not surprising or unique to long COVID, but they are a step toward pinpointing the etiology.

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Researchers aren't the only ones studying the syndrome. 

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